How to write 一流一流

one; single; a (article); as soon as; entire; whole; all; throughout; "one" radical in Chinese characters (Kangxi radical 1); also pr. [yāo] for greater clarity when spelling out numbers digit by digit

to flow; to disseminate; to circulate or spread; to move or drift; to degenerate; to banish or send into exile; stream of water or sth resembling one; class, rate or grade